Secrets of New York City

The latest sonar technology reveals shipwrecks as never seen before. As water and land drain away: a secret beneath Manhattan's skyline, an earth-shattering feat of engineering, a record-breaking icon and a casualty of WWI stealth warfare. Examining these hidden giants can explain New York City's meteoric rise to bustling world metropolis. A city that can't be kept down, forever pushing forward, with true grit and determination.